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The customer should be familiar with the recommended frequencies of running
auto tunes.
Run the following tunes as needed based on general system performance,
perhaps once every two weeks:
•
Integrator Zero, Set Electron Multiplier, Trap DC Offset Voltage, Electron
Lens Tuning, and Ion Lens Tuning.
Run the following auto tunes as needed for mass assignment:
•
RF Full Scale Adjust, Mass Calibration, and Trap Frequency Calibration.
NOTE: The Deviation read back on the Diagnostic page being greater than 3 µA
can indicate a need for Electron Lens Tuning, and Ion Lens Tuning as mentioned
in section 3.1 of this document.
Summary of Contents for 4000 GCMS
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